gmp: remove hack used with the previous toolchain
gmp: remove hack used with the previous toolchain

justinjoy/cerbero,superdump/cerbero,ikonst/cerbero,fluendo/cerbero,OptoFidelity/cerbero,davibe/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,EricssonResearch/cerbero,EricssonResearch/cerbero,nirbheek/cerbero,davibe/cerbero,OptoFidelity/cerbero,superdump/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,flexVDI/cerbero,EricssonResearch/cerbero,nirbheek/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,centricular/cerbero,sdroege/cerbero,nirbheek/cerbero,ramaxlo/cerbero,BigBrother-International/gst-cerbero,nzjrs/cerbero,EricssonResearch/cerbero,AlertMe/cerbero,lubosz/cerbero,fluendo/cerbero,ford-prefect/cerbero,cee1/cerbero-mac,centricular/cerbero,atsushieno/cerbero,ford-prefect/cerbero,cee1/cerbero-mac,ylatuya/cerbero,multipath-rtp/cerbero,ramaxlo/cerbero,nzjrs/cerbero,cee1/cerbero-mac,OptoFidelity/cerbero,ramaxlo/cerbero,jackjansen/cerbero,GStreamer/cerbero,lubosz/cerbero,multipath-rtp/cerbero,atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,superdump/cerbero,ikonst/cerbero,ford-prefect/cerbero,OptoFidelity/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,BigBrother-International/gst-cerbero,centricular/cerbero,ylatuya/cerbero,fluendo/cerbero,multipath-rtp/cerbero,brion/cerbero,AlertMe/cerbero,ylatuya/cerbero,justinjoy/cerbero,nirbheek/cerbero-old,multipath-rtp/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,AlertMe/cerbero,shoreflyer/cerbero,nzjrs/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,superdump/cerbero,flexVDI/cerbero,nzjrs/cerbero,fluendo/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,GStreamer/cerbero,multipath-rtp/cerbero,GStreamer/cerbero,cee1/cerbero-mac,AlertMe/cerbero,davibe/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,sdroege/cerbero,flexVDI/cerbero,sdroege/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,flexVDI/cerbero,ford-prefect/cerbero,flexVDI/cerbero,justinjoy/cerbero,BigBrother-International/gst-cerbero,nirbheek/cerbero,nirbheek/cerbero-old,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,BigBrother-International/gst-cerbero,justinjoy/cerbero,brion/cerbero,shoreflyer/cerbero,centricular/cerbero,shoreflyer/cerbero,ikonst/cerbero,nzjrs/cerbero,ylatuya/cerbero,atsushieno/cerbero,brion/cerbero,sdroege/cerbero,EricssonResearch/cerbero,nirbheek/cerbero-old,nirbheek/cerbero-old,fluendo/cerbero,jackjansen/cerbero,shoreflyer/cerbero,shoreflyer/cerbero,atsushieno/cerbero,jackjansen/cerbero,BigBrother-International/gst-cerbero,lubosz/cerbero,centricular/cerbero,ramaxlo/cerbero,jackjansen/cerbero,atsushieno/cerbero,ramaxlo/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,GStreamer/cerbero,GStreamer/cerbero,brion/cerbero,ikonst/cerbero,davibe/cerbero,ikonst/cerbero,AlertMe/cerbero,brion/cerbero,lubosz/cerbero,sdroege/cerbero